I would go with the begrafnis brief ...
are you refering to Dr Jordaan Potgieter's PDF document or who's There are serveral documents about Herman Janz Potgieter written by different people.
I search Dr Jordaan Potgieter's document on the Herman Janz Potgieter decendants and found an entry on page 11:
1.1.6.4.7.2. Cornelis Dirk POTGIETER, g. 4 Mei 1825 in Grahamstad,24 s. 8 Sep 1899 in Mapochsgronden, Middelburg,24 beroep landbouer. MHG 16967, 74j 3m 4d.
Hy trou24 Magdalena Maria Catharina MEYER, g. 22 Mrt 1820 in Grahamstad,24 (dogter van Johannes Cornelis MEYER en Martha Maria SCHEEPERS) s. 27 Jan 1900 in Mapochsgronden, Middelburg.24 Magdalena: MHG 0/16968, 79j 10m 5d.
then further on at the bottom of p 12 we have your hubby's grandfather (I think)
1.1.6.4.7.2.2. Cornelis Dirk POTGIETER, g. 18 Sep 1854.29
Hy trou Catharina Johanna Susanna POTGIETER, trou in Heidelberg, Tvl,28 g. 29 Nov 1859 in Natal,21 (dogter van Jan Andries POTGIETER en Johanna Susanna PRETORIUS) gedoop 24 Des 1859 in Ladysmith, Natal,21 s. 16 Apr 1923 in Boshoffshoop, Middelburg, Tvl,24 verw. nr. b1c6d4e7f3g1,21 beroep huisvrou. Catharina: MHG 51569 64j 4m woon op Boshofshoop, Middelburg, Tvl.
1.1.6.4.7.2.2 has 8 children and the 6th child is :
1.1.6.4.7.2.2.6. Willem Francois POTGIETER, g. 2 Aug 1886,47 gedoop 23 Okt 1887 in Pretoria Herv Kerk.47
e-mail me to willa@willa.co.za - then I will forward you dr Jordaan Potgieter's e-mail. I am sure he will be able to help to clarify this and then I would love to be updated too, as I am working on a Global Potgieter Document
Willa